NGC 6888 is an emission nebula that features a bright central star. This star is classified as a "Wolf-Rayet" star and is a star that is nearing its end. The central star creates a strong steller wind as it sheds off its outer layers. This probably is the cause of the structure of the nebula. Eventually, the central star will end its life in a spectactular supernova explosion.

In this image, North is Up. This image is cropped to 68% of the original.

This is a beautiful nebula, particularly when you capture the outer wispy elements. Unfortunately, I wasn't able to pull out these outer edges in this image. Its still a pretty good picture, but I'll probably want to re-image this object sometime.